期刊
PHYSICS LETTERS B
卷 696, 期 1-2, 页码 16-22出版社
ELSEVIER
DOI: 10.1016/j.physletb.2010.11.070
关键词
Neutrino telescope; Diffuse muon neutrino flux; ANTARES
资金
- Centre National de la Recherche Scientifique (CNRS)
- Commissariat a l'energie atomique et aux energies alternatives (CEA)
- Agence National de la Recherche (ANR)
- Commission Europenne
- Region Alsace
- Region Provence-Alpes-Cote d'Azur
- Departement du Var and Ville de La Seyne-sur-Mer, France
- Bundesministerium fur Bildung und Forschung (BMBF), Germany
- Istituto Nazionale di Fisica Nucleare (INFN), Italy
- Stichting voor Fundamenteel Onderzoek der Materie (FOM)
- Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO), The Netherlands
- Council of the President of the Russian Federation, Russia
- National Authority for Scientific Research (ANCS), Romania
- Ministerio de Ciencia e Innovacion (MICINN)
- Prometeo of Generalitat Valenciana (GVA)
- MultiDark, Spain
A search for a diffuse flux of astrophysical muon neutrinos, using data collected by the ANTARES neutrino telescope is presented. A (0.83 x 2 pi) sr sky was monitored for a total of 334 days of equivalent live time. The searched signal corresponds to an excess of events, produced by astrophysical sources, over the expected atmospheric neutrino background. The observed number of events is found compatible with the background expectation. Assuming an E-2 flux spectrum, a 90% c.l. upper limit on the diffuse nu(mu) flux of E-2 Phi(90%) = 5.3 x 10(-8) GeV cm(-2) s(-1) sr(-1) in the energy range 20 TeV-2.5 PeV is obtained. Other signal models with different energy spectra are also tested and some rejected. (C) 2010 Elsevier B.V. All rights reserved.
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